add stop conv streaming and thinking text

Author: Jicheng Lu

Directory.Packages.props

@@ -6,8 +6,8 @@
     <PackageVersion Include="A2A" Version="0.3.3-preview" />
     <PackageVersion Include="CsvHelper" Version="33.1.0" />
     <PackageVersion Include="FuzzySharp" Version="2.0.2" />
-    <PackageVersion Include="Google_GenerativeAI" Version="3.6.3" />
-    <PackageVersion Include="Google_GenerativeAI.Live" Version="3.6.3" />
+    <PackageVersion Include="Google_GenerativeAI" Version="3.6.4" />
+    <PackageVersion Include="Google_GenerativeAI.Live" Version="3.6.4" />
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageVersion Include="Polly" Version="8.4.2" />
     <PackageVersion Include="RabbitMQ.Client" Version="7.2.0" />
@@ -33,7 +33,7 @@
     <PackageVersion Include="Whisper.net.Runtime" Version="1.8.1" />
     <PackageVersion Include="NCrontab" Version="3.3.3" />
     <PackageVersion Include="Azure.AI.OpenAI" Version="2.7.0-beta.1" />
-    <PackageVersion Include="OpenAI" Version="2.9.1" />
+    <PackageVersion Include="OpenAI" Version="2.10.0" />
     <PackageVersion Include="MailKit" Version="4.14.1" />
     <PackageVersion Include="Microsoft.Data.Sqlite" Version="10.0.0" />
     <PackageVersion Include="MySql.Data" Version="9.5.0" />

src/Infrastructure/BotSharp.Abstraction/Conversations/Dtos/ChatResponseDto.cs

@@ -46,6 +46,10 @@ public class ChatResponseDto : InstructResult
     [JsonPropertyName("is_streaming")]
     public bool IsStreaming { get; set; }
 
+    [JsonPropertyName("meta_data")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public Dictionary<string, string?>? MetaData { get; set; }
+
     [JsonPropertyName("created_at")]
     public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
 }

src/Infrastructure/BotSharp.Abstraction/Conversations/IConversationCancellationService.cs

@@ -0,0 +1,33 @@
+using System.Threading;
+
+namespace BotSharp.Abstraction.Conversations;
+
+/// <summary>
+/// Service to manage cancellation tokens for streaming chat completions.
+/// Allows stopping an active streaming response by conversation ID.
+/// </summary>
+public interface IConversationCancellationService
+{
+    /// <summary>
+    /// Register a new cancellation token source for the given conversation.
+    /// Returns the CancellationToken to be used in streaming loops.
+    /// </summary>
+    CancellationToken RegisterConversation(string conversationId);
+
+    /// <summary>
+    /// Cancel an active streaming operation for the given conversation.
+    /// </summary>
+    /// <returns>True if the conversation was found and cancelled, false otherwise.</returns>
+    bool CancelStreaming(string conversationId);
+
+    /// <summary>
+    /// Remove the cancellation token source for the given conversation.
+    /// Should be called when streaming completes (either normally or via cancellation).
+    /// </summary>
+    void UnregisterConversation(string conversationId);
+
+    /// <summary>
+    /// Get the cancellation token for the given conversation if one is registered.
+    /// </summary>
+    CancellationToken GetToken(string conversationId);
+}

src/Infrastructure/BotSharp.Core/Conversations/ConversationPlugin.cs

@@ -48,6 +48,9 @@ public void RegisterDI(IServiceCollection services, IConfiguration config)
             return settingService.Bind<GoogleApiSettings>("GoogleApi");
         });
 
+        // Streaming cancellation
+        services.AddSingleton<IConversationCancellationService, ConversationCancellationService>();
+
         // Observer and observable
         services.AddSingleton<MessageHub<HubObserveData<RoleDialogModel>>>();
         services.AddScoped<ObserverSubscriptionContainer<HubObserveData<RoleDialogModel>>>();

src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationCancellationService.cs

@@ -0,0 +1,63 @@
+using System.Collections.Concurrent;
+
+namespace BotSharp.Core.Conversations.Services;
+
+public class ConversationCancellationService : IConversationCancellationService
+{
+    private readonly ConcurrentDictionary<string, CancellationTokenSource> _cancellationTokenSources = new();
+    private readonly ILogger _logger;
+
+    public ConversationCancellationService(
+        ILogger<ConversationCancellationService> logger)
+    {
+        _logger = logger;
+    }
+
+    public CancellationToken RegisterConversation(string conversationId)
+    {
+        // Cancel any existing streaming for this conversation
+        if (_cancellationTokenSources.TryRemove(conversationId, out var existingCts))
+        {
+            existingCts.Cancel();
+            existingCts.Dispose();
+            _logger.LogWarning("Cancelled existing streaming session for conversation {ConversationId}", conversationId);
+        }
+
+        var cts = new CancellationTokenSource();
+        _cancellationTokenSources[conversationId] = cts;
+        _logger.LogInformation("Registered streaming cancellation for conversation {ConversationId}", conversationId);
+        return cts.Token;
+    }
+
+    public bool CancelStreaming(string conversationId)
+    {
+        if (_cancellationTokenSources.TryGetValue(conversationId, out var cts))
+        {
+            cts.Cancel();
+            _logger.LogInformation("Streaming cancelled for conversation {ConversationId}", conversationId);
+            return true;
+        }
+
+        _logger.LogWarning("No active streaming found for conversation {ConversationId}", conversationId);
+        return false;
+    }
+
+    public void UnregisterConversation(string conversationId)
+    {
+        if (_cancellationTokenSources.TryRemove(conversationId, out var cts))
+        {
+            cts.Dispose();
+            _logger.LogDebug("Unregistered streaming cancellation for conversation {ConversationId}", conversationId);
+        }
+    }
+
+    public CancellationToken GetToken(string conversationId)
+    {
+        if (_cancellationTokenSources.TryGetValue(conversationId, out var cts))
+        {
+            return cts.Token;
+        }
+
+        return CancellationToken.None;
+    }
+}

src/Infrastructure/BotSharp.OpenAPI/Controllers/Conversation/ConversationController.cs

@@ -131,6 +131,7 @@ public async Task<IEnumerable<ChatResponseModel>> GetDialogs(
                     Data = message.Data,
                     Sender = UserDto.FromUser(user),
                     Payload = message.Payload,
+                    MetaData = message.MetaData,
                     HasMessageFiles = files.Any(x => x.MessageId.IsEqualTo(message.MessageId) && x.FileSource == FileSource.User)
                 });
             }
@@ -146,6 +147,7 @@ public async Task<IEnumerable<ChatResponseModel>> GetDialogs(
                     Text = !string.IsNullOrEmpty(message.SecondaryContent) ? message.SecondaryContent : message.Content,
                     Function = message.FunctionName,
                     Data = message.Data,
+                    MetaData = message.MetaData,
                     Sender = new()
                     {
                         FirstName = agent?.Name ?? "Unkown",
@@ -397,18 +399,36 @@ public async Task<ChatResponseModel> SendMessage(
         await conv.SetConversationId(conversationId, input.States);
         SetStates(conv, input);
 
+        IConversationCancellationService? convCancellation = null;
+        if (input.IsStreamingMessage)
+        {
+            convCancellation = _services.GetRequiredService<IConversationCancellationService>();
+            convCancellation.RegisterConversation(conversationId);
+        }
+
         var response = new ChatResponseModel();
-        await conv.SendMessage(agentId, inputMsg,
-            replyMessage: input.Postback,
-            async msg =>
-            {
-                response.Text = !string.IsNullOrEmpty(msg.SecondaryContent) ? msg.SecondaryContent : msg.Content;
-                response.Function = msg.FunctionName;
-                response.MessageLabel = msg.MessageLabel;
-                response.RichContent = msg.SecondaryRichContent ?? msg.RichContent;
-                response.Instruction = msg.Instruction;
-                response.Data = msg.Data;
-            });
+        try
+        {
+            await conv.SendMessage(agentId, inputMsg,
+                replyMessage: input.Postback,
+                async msg =>
+                {
+                    response.Text = !string.IsNullOrEmpty(msg.SecondaryContent) ? msg.SecondaryContent : msg.Content;
+                    response.Function = msg.FunctionName;
+                    response.MessageLabel = msg.MessageLabel;
+                    response.RichContent = msg.SecondaryRichContent ?? msg.RichContent;
+                    response.Instruction = msg.Instruction;
+                    response.Data = msg.Data;
+                });
+        }
+        catch (OperationCanceledException) when (input.IsStreamingMessage)
+        {
+            response.Text = string.Empty;
+        }
+        finally
+        {
+            convCancellation?.UnregisterConversation(conversationId);
+        }
 
         var state = _services.GetRequiredService<IConversationStateService>();
         response.States = state.GetStates();
@@ -455,20 +475,20 @@ public async Task SendMessageSse([FromRoute] string agentId, [FromRoute] string
         Response.Headers.Append(Microsoft.Net.Http.Headers.HeaderNames.Connection, "keep-alive");
 
         await conv.SendMessage(agentId, inputMsg,
-            replyMessage: input.Postback,
-            // responsed generated
-            async msg =>
-            {
-                response.Text = !string.IsNullOrEmpty(msg.SecondaryContent) ? msg.SecondaryContent : msg.Content;
-                response.MessageLabel = msg.MessageLabel;
-                response.Function = msg.FunctionName;
-                response.RichContent = msg.SecondaryRichContent ?? msg.RichContent;
-                response.Instruction = msg.Instruction;
-                response.Data = msg.Data;
-                response.States = state.GetStates();
-                
-                await OnChunkReceived(Response, response);
-            });
+                replyMessage: input.Postback,
+                // responsed generated
+                async msg =>
+                {
+                    response.Text = !string.IsNullOrEmpty(msg.SecondaryContent) ? msg.SecondaryContent : msg.Content;
+                    response.MessageLabel = msg.MessageLabel;
+                    response.Function = msg.FunctionName;
+                    response.RichContent = msg.SecondaryRichContent ?? msg.RichContent;
+                    response.Instruction = msg.Instruction;
+                    response.Data = msg.Data;
+                    response.States = state.GetStates();
+
+                    await OnChunkReceived(Response, response);
+                });
 
         response.States = state.GetStates();
         response.MessageId = inputMsg.MessageId;
@@ -477,18 +497,13 @@ await conv.SendMessage(agentId, inputMsg,
         // await OnEventCompleted(Response);
     }
 
-    private async Task OnReceiveToolCallIndication(string conversationId, RoleDialogModel msg)
+    [HttpPost("/conversation/{conversationId}/stop-streaming")]
+    public ConverstionCancellationResponse StopStreaming([FromRoute] string conversationId)
     {
-        var indicator = new ChatResponseModel
-        {
-            ConversationId = conversationId,
-            MessageId = msg.MessageId,
-            Text = msg.Indication,
-            Function = "indicating",
-            Instruction = msg.Instruction,
-            States = new Dictionary<string, string>()
-        };
-        await OnChunkReceived(Response, indicator);
+        var streamingCancellation = _services.GetRequiredService<IConversationCancellationService>();
+        var cancelled = streamingCancellation.CancelStreaming(conversationId);
+
+        return new ConverstionCancellationResponse { Success = cancelled };
     }
     #endregion
 
@@ -515,6 +530,8 @@ private void SetStates(IConversationService conv, NewMessageModel input)
         {
             conv.States.SetState("sampling_factor", input.SamplingFactor, source: StateSource.External);
         }
+
+        conv.States.SetState("use_stream_message", input.IsStreamingMessage, source: StateSource.Application);
     }
 
     private FileContentResult BuildFileResult(string file)
@@ -567,5 +584,19 @@ private JsonSerializerOptions InitJsonOptions(BotSharpOptions options)
 
         return jsonOption;
     }
+
+    private async Task OnReceiveToolCallIndication(string conversationId, RoleDialogModel msg)
+    {
+        var indicator = new ChatResponseModel
+        {
+            ConversationId = conversationId,
+            MessageId = msg.MessageId,
+            Text = msg.Indication,
+            Function = "indicating",
+            Instruction = msg.Instruction,
+            States = []
+        };
+        await OnChunkReceived(Response, indicator);
+    }
     #endregion
 }

src/Infrastructure/BotSharp.OpenAPI/ViewModels/Conversations/Request/NewMessageModel.cs

@@ -1,6 +1,15 @@
+using System.Text.Json.Serialization;
+
 namespace BotSharp.OpenAPI.ViewModels.Conversations;
 
 public class NewMessageModel : IncomingMessageModel
 {
     public override string Channel { get; set; } = ConversationChannel.OpenAPI;
+
+    /// <summary>
+    /// Indicates whether this message uses streaming completion.
+    /// When true, the streaming can be stopped via the stop endpoint.
+    /// </summary>
+    [JsonPropertyName("is_streaming_msg")]
+    public bool IsStreamingMessage { get; set; }
 }

src/Infrastructure/BotSharp.OpenAPI/ViewModels/Conversations/Response/ConverstionCancellationResponse.cs

@@ -0,0 +1,5 @@
+namespace BotSharp.OpenAPI.ViewModels.Conversations;
+
+public class ConverstionCancellationResponse : ResponseBase
+{
+}